{
  "manageEntity": {
    "action": "Save",
    "entityId": "1999343969",
    "entityType": "Track",
    "nonce": "0xc00d505e1820563076070c6191a103bdb5a866cf8bb5f268c09e26ba6c6c4011",
    "signature": "0x5a165829757ddf3523ab9c92cefc3d3d1e12d4cdcd65dda81617072a2f3f81e1606476cb03329510a29d5351f93c29e4b841d1fe5338856d6dc4cccdf42e61a51c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}